A young man killed on a Belgian battlefield during the First World War will be buried as an unknown soldier after defence chiefs failed to track down his Irish relatives.
Investigators said they carried out an exhaustive search to trace any living links to Private James Rowan, whose family are believed to be from Co Longford, but their results were inconclusive.
It is understood a number of people from Longford, as well as a Manchester-based priest called Fr Rowan, came forward after an appeal last year following the discovery of the soldier's suspected remains.
Longford's county archivist was also enlisted into the search.
But Lynne Gammond, of British army headquarters at Andover, Wiltshire, said they could not prove any family connections - despite trawling through family trees and other historical documents.
"It is very sad actually," she said.
"There was a huge response but we just couldn't make the link.
"We have DNA from the remains, so if anyone can prove a positive link in future then we can still carry out tests."
Private Rowan's suspected remains were among six sets found close to a railway siding outside the Belgian village of Comines-Warneton just five years ago.
Aged just 30 years old, he was killed on a battlefield at the site on October 20, 1914.
The remains were found by an amateur archaeologist during a dig.
Having cross-referenced military records, including war and regimental diaries kept from the time, the UK Ministry of Defence (MoD) Joint Casualty and Compassionate Centre - which investigates the discovery of missing bodies killed in action - believe the remains are those of Private Rowan.
But they need to establish a firm family link, and confirm through DNA testing, to conclusively prove the identity.
The soldier's family is believed to have moved from their native Co Longford to Lancashire in England, where he was born in the late 1800s.
As a young man he took a job as a miner at Park Lane Colliery near Wigan, before going on to enlist with the 1st Battalion The Lancashire Fusiliers when the Great War broke out.
He is among those remembered on the Ploegsteert Memorial in Flanders, which records the many missing in the First World War.
It is believed the Rowan family moved back to Co Longford.
The MoD said it carried out "exhaustive research" and is now planning a re-interment and memorial service for the designated unknown soldier.
The ceremony, with full military honours, will take place on April 16 at the Prowse Point Commonwealth War Graves Cemetery in Belgium, close to where the remains were discovered.
The cemetery is located in Ypres Salient which was on the Western Front.
He will be buried along with his five other fallen comrades, who have also been designated unknown soldiers, after failed attempts to positively identify them.